Least and Most Polluting Cars, 2014

The ACEEE's Green Book®, a buyer's guide to
environmentally friendly passenger vehicles, rates cars according to
their emissions and fuel consumption, and publishes an annual list of
the "greenest" and "meanest" (i.e., most
polluting).

Greenest
vehicles

MPG:city1

MPG:hwy.1

Green2score

1. MERCEDES-BENZ SMART ELECTRIC DRIVE CONVERTIBLE / COUPE

3.61

2.77

59

2. TOYOTA PRIUS C

53

46

57

3. NISSAN LEAF

3.75

3.01

55

4. TOYOTA PRIUS

51

48

55

5. HONDA CIVIC HYBRID

44

47

55

6. LEXUS CT 200H

51

48

55

7. TOYOTA PRIUS PLUG-IN HYBRID

3.9/51

3.0/49

55

8. MITSUBISHI MIRAGE

37

44

54

9. HONDA CIVIC NATURAL GAS

27

38

54

10. HONDA INSIGHT

41

44

53

11. MERCEDES-BENZ SMART FORTWO CONVERTIBLE/COUPE

34

38

53

12. VOLKSWAGEN JETTA HYBRID

42

48

53

Meanest
vehicles

MPG:city

MPG:hwy.

Green2score

1. CADILLAC ESCALADE ESV

13

18

23

2. LAMBORGHINI AVENTADOR ROADSTER

10

16

23

3. ROLLS-ROYCE PHANTOM EWB

11

19

23

4. ROLLS-ROYCE PHANTOM DROPHEAD COUPE

11

19

23

5. FORD EXPEDITION FFV/LINCOLN NAVIGATOR FFV

13

18

22

6. FORD F-150 RAPTOR

11

16

22

7. MERCEDES-BENZ G550

12

15

22

8. MERCEDES-BENZ G63 AMG

12

14

21

9. BENTLEY MULSANNE

11

18

21

10. FORD E-350 WAGON FFV

12

16

21

11. BUGATTI VEYRON

8

15

19

12. RAM 2500

13

18

18

NOTE: MPG = miles per gallon. 1. Fuel economy for electric vehicles is provided in miles per kilowatt-hour. 2. The green score runs
on a scale from 0 to 100. The top vehicle this year scored a 59, and the
worst gas-guzzler scored 23. The score is based on automakers' test
results for fuel economy and emissions as reported to the EPA, as well as
an estimate of pollution from vehicle manufacturing, from the production
and distribution of fuel, and from vehicle tailpipes. It also factors in
air pollution. Source: Web: American Council for an
Energy-Efficient Economy (ACEEE).